Solar building heating and ventilating system

The utility model relates to the technical field of solar buildings, in particular to a solar building heating and ventilating system which comprises a solar heat collector located on the top face of a building body, a partition plate is arranged on the inner side of the top of the building body, an air blower and a heat exchange mechanism are arranged on the top face of the partition plate, and an air outlet of the air blower directly faces the heat exchange mechanism. A water inlet and a water outlet are formed in the top surface of the heat exchange mechanism, the water inlet is communicated with the water outlet end of the solar heat collector, and the water outlet is communicated with the water inlet end of the solar heat collector; a heat exchange pipe is hinged to the bottom face of the partition plate, a hose is connected to the end, close to the hinged part, of the heat exchange pipe, and the end, away from the heat exchange pipe, of the hose penetrates to the position above the partition plate and i